The roots, stems, leaves and fruits of camphor trees all contain volatile oils. Natural volatile oils of camphor trees are one of the main woody aromatic oils. Camphor tree volatile oil is liquid at room temperature, sensitive to air, light and temperature, and easy to decompose and metamorphose. In the production, storage and use of camphor tree volatile oil products, hydroxypropyl beta-cyclodextrin is often used to improve the chemical stability of camphor tree volatile oil products, prevent volatilization or rapid volatilization of volatile oil, facilitate long-term preservation, or to make the volatile oil in products uniformly and slowly release, reflecting the characteristics of products. Technology to meet product design requirements.Hydroxypropyl beta-cyclodextrin is one of beta-cyclodextrin derivatives which have been studied thoroughly in recent years due to its high water solubility. Hydroxypropyl beta-cyclodextrin not only has excellent encapsulation effect on many compounds like beta-CD and improves the stability of the encapsulated substances, but also has high water solubility and can improve the release rate and bioavailability of the encapsulated drugs in vivo. Therefore, hydroxypropyl beta-cyclodextrin has some special excellent properties, wider application scope and the most promising application in medicine.

The hydroxypropyl beta-cyclodextrin inclusion complex of camphor leaf volatile oil was prepared under the optimum inclusion conditions, which could solve the volatility and stability problems in the process of use, and was conducive to large-scale production and application.